At this annual retreat, big thinkers and tech types wax philosophical on how technology is–or should be–changing the world. The three-part agenda tackles how humans affect and are affected by their intellectual, business, physical, and technological environments. Check out any presentation live and free on the Web; 50% of questions in each session will come from online viewers. Here’s a sampling:

Psyche channel
Before talking change, Pop!Tech wants to understand how people think. So cognitive scientist Steven Pinker joins Harvard psychology professor and Stumbling on Happiness author Daniel Gilbert to puzzle over the workings of the human brain. Biz types should pay special attention to their discussion of why we overemphasize some risks and underestimate others.